-Super slim 1.75" outside diameter
-Five anti-rotation QD swivels
-Includes one 2.1" 5-slot KeyMod rail section
-High quality MIL-STD 1913 top rail, T-marked for accessory location
-Made of 6061 aluminum, hard coat anodized
-Fully dehorned for a non-abrasive, comfortable feel
-Barrel nut included
Compatible with Aero Precision and other DPMS high-tang upper receivers.